<template>
  <div class="login-container">
    <div class="login-form">
      <el-form ref="loginForm" :model="loginForm" :rules="loginRules" auto-complete="on" label-position="left">
        <div class="content-box">
          <div class="title-container">
            <h3 class="title">欢迎登录</h3>
          </div>

          <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user"/>
        </span>
            <el-input
              ref="username"
              v-model="loginForm.username"
              placeholder="Username"
              name="username"
              type="text"
              tabindex="1"
              auto-complete="on"
            />
          </el-form-item>

          <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password"/>
        </span>
            <el-input
              :key="passwordType"
              ref="password"
              v-model="loginForm.password"
              :type="passwordType"
              placeholder="Password"
              name="password"
              tabindex="2"
              auto-complete="on"
              @keyup.enter.native="handleLogin"
            />
            <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'"/>
        </span>
          </el-form-item>

          <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
                     @click.native.prevent="handleLogin">登 录
          </el-button>

          <!--<div class="tips">
            <span style="margin-right:20px;">username: admin</span>
            <span> password: any</span>
          </div>-->
        </div>
      </el-form>
    </div>
  </div>
</template>

<script>
/* import {validUsername} from '@/utils/validate' */

export default {
  name: 'Login',
  data () {
    /* const validateUsername = (rule, value, callback) => {
      if (!validUsername(value)) {
        callback(new Error('请输入正确的用户名'))
      } else {
        callback()
      }
    } */
    const validatePassword = (rule, value, callback) => {
      if (value.length < 5) {
        callback(new Error('请输入正确的密码！'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: '',
        password: ''
      },
      loginRules: {
        username: [{required: true, message: '不能为空！', trigger: 'blur'}],
        password: [{required: true, trigger: 'blur', validator: validatePassword}]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function (route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  methods: {
    showPwd () {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin () {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('Login', this.loginForm).then(() => {
            this.loading = false
            this.$router.push({path: this.redirect || '/'})
          }).catch(() => {
            this.loading = false
          })
        } else {
          this.loading = false
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style lang="scss" scoped>
  $bg: #4fbf8d;
  $dark_gray: #889aa4;
  $light_gray: #333333;

  .login-container {
    height: 100vh;
    width: 100%;
    overflow: hidden;
    background-color: $bg;
    overflow: hidden;
    color: white;
    .login-form {
      position: relative;
      margin-top: 200px;
      width: 100%;
      min-height: calc(100vh - 144px);
      background-size: 100% 100%;
      background-repeat: no-repeat;
    }
    .content-box {
      width: 470px;
      height: 370px;
      background-color: #ffffff;
      border-radius: 5px;
      padding: 30px 30px;
      margin: 0 auto;
      .tips {
        font-size: 14px;
        color: #333333;
        margin-bottom: 10px;

        span {
          &:first-of-type {
            margin-right: 16px;
          }
        }
      }

      .svg-container {
        padding: 6px 5px 6px 15px;
        color: $dark_gray;
        vertical-align: middle;
        width: 30px;
        display: inline-block;
      }

      .title-container {
        position: relative;

        .title {
          text-align: center;
          font-size: 24px;
          color: $light_gray;
          margin: 0px auto 40px auto;
        }
      }

      .show-pwd {
        position: absolute;
        right: 10px;
        top: 7px;
        font-size: 16px;
        color: $dark_gray;
        cursor: pointer;
        user-select: none;
      }
    }
  }
</style>
